109887639 has 16 divisors (see below), whose sum is σ = 148254720. Its totient is φ = 72394560.

The previous prime is 109887637. The next prime is 109887671. The reversal of 109887639 is 936788901.

It is not a de Polignac number, because 109887639 - 2¹ = 109887637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 109887591 and 109887600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109887637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144019 + ... + 144779.

It is an arithmetic number, because the mean of its divisors is an integer number (9265920).

Almost surely, 2^109887639 is an apocalyptic number.

109887639 is a deficient number, since it is larger than the sum of its proper divisors (38367081).

109887639 is a wasteful number, since it uses less digits than its factorization.

109887639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270.

The product of its (nonzero) digits is 653184, while the sum is 51.

The square root of 109887639 is about 10482.7305126098. The cubic root of 109887639 is about 478.9787880885.

The spelling of 109887639 in words is "one hundred nine million, eight hundred eighty-seven thousand, six hundred thirty-nine".